Jessica Jackson is a time-witch whose familiar and lover is a shifter named Titus. She comes from a long line of witches, stretching back to ancient Lemuria and can step through the doors of time, using her grimoire, her ancient book of magic, garnered from magicians and witches from many civilizations and times.

Jessica and Titus found themselves trapped in the Grimoire after they escaped from the witchfinder, Gideon Fallowfield. A release spell goes wrong, and Jessica finds herself flung into a magic ceremony in 1776, conducted by the infamous and ruthless Count Luigi de Cortellazo.